Audio video offset detector

A system for determining a temporal offset between video content and audio content, the video content and the audio content being included in video that is subject to processing, the system comprising:

• a reference audio fingerprint extractor operative, prior to the processing of the video, to obtain reference audio fingerprint data from the audio content;
• a reference video fingerprint extractor operative, prior to the processing of the video, to obtain reference video fingerprint data from the video content, wherein each of the reference audio fingerprint data and the reference video fingerprint data includes associated time stamp data;
• a target audio fingerprint extractor operative, subsequent to the processing of the video, to obtain target audio fingerprint data from the audio content;
• a target video fingerprint extractor operative, subsequent to the processing of the video, to obtain target video fingerprint data from the video content, wherein each of the target audio fingerprint data and the target video fingerprint data includes associated time stamp data, wherein the reference audio fingerprint data includes one or more reference audio fingerprints characteristic of the audio content prior to the processing of the video, and wherein the target audio fingerprint data includes at least one target audio fingerprint characteristic of the audio content subsequent to the processing of the video;
• an audio fingerprint matcher operative (a) to perform fingerprint matching of the target audio fingerprint against one or more of the reference audio fingerprints to obtain one or more reference audio fingerprints that at least substantially match the target audio fingerprint, and, (b) through use of at least the time stamp data associated with the target audio fingerprint data and the time stamp data associated with the reference audio fingerprint data, to obtain one or more audio time stamp offsets indicative of one or more temporal offsets between the target audio fingerprint and one or more of the reference audio fingerprints that at least substantially match the target audio fingerprint, wherein the reference video fingerprint data includes one or more reference video fingerprints characteristic of the video content prior to the processing of the video, and wherein the target video fingerprint data includes at least one target video fingerprint characteristic of the video content subsequent to the processing of the video;
• a video fingerprint matcher operative (a) to perform fingerprint matching of the target video fingerprint against one or more of the reference video fingerprints to obtain one or more reference video fingerprints that at least substantially match the target video fingerprint, and, (b) through use of at least the time stamp data associated with the target video fingerprint data and the time stamp data associated with the reference video fingerprint data, to obtain one or more video time stamp offsets indicative of one or more temporal offsets between the target video fingerprint and one or more of the reference video fingerprints that at least substantially match the target video fingerprint;
• and
• an offset estimator operative, through use of at least (a) one or more of the audio time stamp offsets and (b) one or more of the video time stamp offsets, to obtain a value indicative of the temporal offset between the video content and audio content.

A system for determining a temporal offset between video content and audio content, the video content and the audio content being included in video that is subject to processing, the system comprising:

• a reference fingerprint database operative, prior to the processing of the video, to store reference audio fingerprint data from the audio content and reference video fingerprint data from the video content, wherein each of the reference audio fingerprint data and the reference video fingerprint data includes associated time stamp data;
• a target audio fingerprint extractor operative, subsequent to the processing of the video, to obtain target audio fingerprint data from the audio content;
• a target video fingerprint extractor operative, subsequent to the processing of the video, to obtain target video fingerprint data from the video content, wherein each of the target audio fingerprint data and the target video fingerprint data includes associated time stamp data, wherein the reference audio fingerprint data includes one or more reference audio fingerprints characteristic of the audio content prior to the processing of the video, and wherein the target audio fingerprint data includes at least one target audio fingerprint characteristic of the audio content subsequent to the processing of the video;
• an audio fingerprint matcher operative (a) to perform fingerprint matching of the target audio fingerprint against one or more of the reference audio fingerprints to obtain one or more reference audio fingerprints that at least substantially match the target audio fingerprint, and, (b) through use of at least the time stamp data associated with the target audio fingerprint data and the time stamp data associated with the reference audio fingerprint data, to obtain one or more audio time stamp offsets indicative of one or more temporal offsets between the target audio fingerprint and one or more of the reference audio fingerprints that at least substantially match the target audio fingerprint, wherein the reference video fingerprint data includes one or more reference video fingerprints characteristic of the video content prior to the processing of the video, and wherein the target video fingerprint data includes at least one target video fingerprint characteristic of the video content subsequent to the processing of the video;
• a video fingerprint matcher operative (a) to perform fingerprint matching of the target video fingerprint against one or more of the reference video fingerprints to obtain one or more reference video fingerprints that at least substantially match the target video fingerprint, and, (b) through use of at least the time stamp data associated with the target video fingerprint data and the time stamp data associated with the reference video fingerprint data, to obtain one or more video time stamp offsets indicative of one or more temporal offsets between the target video fingerprint and one or more of the reference video fingerprints that at least substantially match the target video fingerprint;
• and
• an offset estimator operative, through use of at least (a) one or more of the audio time stamp offsets and (b) one or more of the video time stamp offsets, to obtain a value indicative of the temporal offset between the video content and audio content.